Telephone attachment



July 7, 1931. F PEAK 1,813,505

TELEPHONE ATTACHMENT Filed March 26, 1929 2 Sheets-Sheet 1 IN VEN TOR.

Fade ziakffeak,

1 .QYMN

A TTORNEYS.

July 7, 1931. F. T. PEAK 1,813,505

' TELEPHONE ATTACHMENT Filed March 26, 1 29 2 Sheets-Sheet 2 IN V E N TGR.

fledezgck 1721964 70,

A TTOR NEYS.

Patented July 7, 1931 FREDERICK TnToMAs' PnAK, on NEW Youicn. Y;

TELEPHO E ATTACHMENT Application filed March 26, I929 Scrialllo. 350,083.

This inventionrelates to telephone attachmentsh Itis among the objects of the present invention to provide an attachment for telephones which may be utilized to cut oil sound waves to the diaphragm of the transmitter.

It isa further object of the-invention to provide a: telephone attachment which includes-1a shutter for cutting'out sound waves -tothetransmitter. and electrical means for actuating, the shutter;

It is a still further object of the invention to provide a-telephone having an electrical control transmitter shutter and a circuit controller for operatingsaid shutter mounted upon the receiver in such manner as to provide for the operationiof the shutter by the receiverholding hand.

The present invention is designed to provide means forclosing thetransmitter during the period when the party using the device listens to thewperson speaking at the other end of'the line when the telephone is being used: in noisy surroundings; In many instances, in operating a telephone, it is necessary tohold the hand or the cheek against the transmitter to prevent noises being picked up thereby and carried to thercceiver. In this connection, it willvbe understood that local noises entering the mouthpiece of the transmitter of a: telephone pass directly through the instrument to the receiver where they are clearly: audible ofttimesrendering the. speech from the opposite end of the system inaudible.

Other important objects of the present invention include the combination and interrelation ofparts, whereby thewhole' forms a simple and efficient structure readily designed to meet the demands of economic manufacture;

Numerous other objects and features of the present invention will be apparent from a consideration of the specific specification taken in conjunction with the accompanying drawings, in which V igure 1 is a perspective View of one form of my-present-invention appliedto the con ventionaltype of desk telephone now in use;

through the lines 33 ofFig. 2

Fig. 4 is atop plan View of that portion ofthe device shownin Figs. 2 and 3;

Fig. 5 is a bottom plan View of the device shown in Figs. 2 and 3;"

Fig. 6 is a sectional view showing the circuit controller applied to the telephone receiver;

7 is a sectional View talen on the lines 7 7 of Fig.6; 7 m

Fig. 8 is-a detail view of part of the circuit controlling assembly, and

Fig. 9 is a Wiring dia ram for the apparatus.

Referring. more particularly to Figs. 1 to 5 inclusive of the drawings, it will be seen that the invention includes ashutter housing comprising a back 10 and casing 11. The housing is adapted to be secured to the transmitter by the threaded engagementof an extending sleeve 12 with the mouthpiece receiving portion of the transmitter. The I usual mouthpiece 13-is threadedly engaged through the casing 11, in alineuient with the sleeve 12 ,the engagementbeing with an internally threaded bushing Ll which secured to the casingcll. For icontrollingthe admittance of sound waves through the sleeve l2to the transmitter, a shutter 15 is provided, which includes a plurality of slots '16, I

vwhich co-operate with slots 1 in the inner end of the sleeve 12: It-will be understood that registration of the slots 17 and 16 permit free passage of sound waves therethrough and that movement of the shutter 15 to break the registration of the slots will prevent the passage of sound waves there through, It will further be seen that the inner ends of the sleeve Brand bushing 14- 'co-operate with guiding members 18, to provide for thereciprocation ofthe shutter 15 therebetween. The'shutter 15 is adapted for actuation in response to the movement of an associated shaft 19 secured between bifurcations 20 depending: from the shutten For manually controlling the shutter, should the shaft 19 fail to properly operate, the shutter '32 of the pivoted arm 33.

is provided with an extending member 21. which when the shutter is in fully raised position cutting off the flow of sound waves and as indicated in Fig. 3, extends through the casing 11 and may be manually depressed to restore the shutter to registering position.

For normally raising the shutter in the raised closing position shown in Fig. 3, the shaft 19 is associated with a bar 22 through which the shaft 19 is secured by theprovision of a locking nut 23. The bar or arm 22 is mounted on its extremities for free movement over a pair of vertical guide members 24, which are surrounded by expansion springs 25, which abut the under face of the arm 22, thus normally urging it upwardly. The lower ends of the springs 25 abut an angled bracket 26, to which the guides 24 are secured and which is secured to the back 10 by suitable threaded members 27 For moving the shaft 19 downwardly against the tension of the springs 25, thus alining the slots 16 and 17 to permit the passage of sound waves to the transmitter, a pair of electromagnets 28 are provided, the poles 29 of which utilize the arm 22 as an armature, whereby energization of the magnets moves t 1e arm 22 downwardly thus moving the shaft 19 to affect the shutter 15. The electromagnets 28 are mounted upon a base 30, which acts to close the lower end of the magnetic field therebetween. The base 30 is mounted upon the bracket 26 and is centrally apertured to receive therethrough the lower end of the shaft 19 which is preferably journaled through the bracket 26. For retaining the shutter 15 in. its downward position against the tension of the springs 25 as brought about by the influence of the magnets 28, the shaft 19 is provided with a projecting portion 31, which is adapted to be engaged by the inwardly extending portion The arm '33 is pivoted at 34, to depending apertured bifurcations of the bracket 26. The arm 33 is normally urged toward the center of the shaft 19 by the provision of a simple leaf spring 36, mounted upon the casing 11. It will readily be seen that as the shaft 19 is moved downwardly, the portion 32 of the arm 33 will move inwardly to engage the upper face of the projecting portion 31 of the shaft, thus retaining the shaft in its do wnward position against the tension of the springs For releasing the shaft 19, the lower end of the arm 33 is associated with an electromagnet 37, the outer end of the pole 38 of which is arranged upon energization of the magnet to move inwardly the outer end39 of the arm 33, pivoting the same about its pivot 34 and against the tension of the spring 36, whereby the extremity 32 will move outwardly from the shaft 19, thus releasing the projecting portion 31 thereof. From the drawings it will. be seen that the electromagnet 37 is mounted in conjunction with the bracket 26 and the base 10 by the provision of a suitable threaded engaging means 40.

For controlling the energization of the magnets 28 and 37, a circuit controller, Fig. 6, is associated with the receiver 41. The structure herein presented includes a pair of interthreadedly engaging members 42 and 43, which jointly engage over the rim 44 of the receiver and thus retain themselves in proper position. Associated between the lower ends of the member 42, there engages a semi-circular conductor shield 45 shown in Fig. 8. The shield includes projections 46 which are received in suitable apertures 47 formed in the member 42. By referring to Fig. 6, it will be seen that the shield 45 extends up the receiver to provide for the guiding of a conductor, as will be hereinafter described. v

Associated with the inner member 42, a circuit controller is provided, which includes a pivoted conducting member 48, which upon downward movement is adapted to engage a contact point 49 for completing the electrical circuit therebetween, and which upon upward movement is adapted to contact with a contact 50 to complete the electrical circuit therebetween. The conducting member 48 is urged by association with the spring member 51 to normally engage with the upper contact 50. By referring to Fig. 6, it will be seen that contacts 49 and 50 and the conducting member 48 are mounted within a suitable pro tecting housing 52 carried by the member 42.

By referring more particularly to the diagrammatical illustration of the circuit as shown in Fig. 9, the actuation of the magnet for controlling the shutter will be more fully understood. A source of electrical energy, such as a battery, is provided as at '53, one pole of which leads to the binding post 54 mounted upon the bracket 26, from whichextends a conductor 55, which is joined with the under arm 56 of a circuit maker-and-breaker, which also includes the upper arm 57. By referring to Fig. 2, it will be seen that the arm 57 is adapted for movement in response to movement of the arm 22. Thus the circuit between the arms 57 and 56 is automatically broken when the shutter is in upward closed position, and the circuit is automatically completed therethrough when the shutter moves downwardly. The arm 57 is assoicaled with a conductor 58 which leads to the electromagnet 37 from which a conductor 59 extends to the central binding post 60 associated with which is a. conductor 61, leading to the lower contact 49 of the circuit controller on the receiver.

One side of the electromagnets 28 is also joined with the conductor 55 and receives energy therethrough, while the other side of the magnets is connected with a conductor 62 to a1circuitcontroller including a. moving arm 63and a stationary arm 64. The arm 63 is associated for movement in response to'outw-ardniovement of theend 39' of the'arm '33, which' outward movement breaks the contact between the arms 63"and6 l'. lVhen' the end 39 of the arm 33 is drawninwardlyunder the influence of the magnet 37, the arms 63'and 6% contact. The arm 64; is associated with a conductor 65 which leads to a binding post 66'mounted upon the bracket 26 from which extends a conductor 67 which leads to the upper contact'50, ofthe circuit controller on the receiver. The conducting arm 48' is a .associatedby a conductor68 to the opposite side otthe-battery 53.

In the operation of'the device the normal position ofthe shutter is in the lowered opcned position whereby it is eXtended ready for use. TheconductordS is by means of the springmember 51 also in raised position completing the circuit between the conductors 68 and 67. WVith the shutter in lowered opened position and the conductor 48 in. raised position, thecontact members 63 and'64 are open andithe circuitwhich is completed between the conductors 68 and 67is broken between these contacts. Nh'en the arm 48' is moved down,'the circuit is completed between the coi'iductors 68 and 61 thus permitting the How of current through the magnet 37, the contact members56 and 57' and through the conductor to the battery. This energization of the magnet 37 releases the arm 33, whereby-the springs 25 urge the arm 2-2 upwardly, thus closing the shutter, which action separates the contacts 56 and whereby only an instantaneous flow of fcurrentis permitted When the arm 48 is again released to move upwardly, the circuit is then completed through the conductors 68" and. 67. The inward movement ofthe arm 33 moves the contact 63 for connection with the contact 6 Thus the current is supplied through the conductors 65'and '62 "to energize the magnets 28 and to-be completed through the conductor 55'to the batter whereby the arm 22 will be restored to its open position, the arm 33 moving outwardly to breakthe, contact between the-points63 and 64, andthus utilizes only an instantaneous flow of'the current.

From the foregoing it will be seen that the energy utilized by the device is small, in that the energization of the magnets is only instantaneous; as soon as their work is completed, the circuit is automatically cut off.

It will readily be seen that the invention is simple in construction and operation and thatnumerous changes and modifications and the full use of equivalents may be resorted to without departing from the spirit or scope of the invention as outlined in the appended claims.

hat is claimed is:

1. A telephone apparatus, including a shutter; forthe' transmitter, and electromag netic means for controlling-said shutter, said means including a shaft a ssoci ated with said shutter, a-crossarm mounted uponsaid shaft and electromagnets operable upon energize tion-to move said cross arm.

telephone apparatus; including a shutter for the transmitter; and electromagneticmeansfor'controlling saidshutter, said means including a shaft associated with said shutter, a cross arm mounted upon said shaft, electromagnets operable upon energization to move said cross arm, and resilicntnieans associated with said-cross arm for normally urging the same in shut-ter closing position 3'. A telephone apparatus, including a shutter for the transmitter, and clectromagnetic-means for-controlling said shutter, said means including ashaft associated with said shutter, a cross arm mounted upon said shaft,

electromagnets operable upon energization tomove said cross arm, resilient means associated with'said cross arm forlnormally urgingthe'same in shutter-closingposition, and means for holding; said" shutter in opened position.

4; A telephone apparatus, including a shutter forthe transmitter, and electromagnetic means for controlling said shutter, said means includinga'sh'att associated with said shutter, a cross arm mounted upon said shaft, electromagnets operable upon "energization tomov-e said-cross arm, resilient means associated with said cross arm for normallynrging the same inshutter-closing position means for holdingsaid shutter'in opened position, and electromagnetic means for releasing said holding means. I

5. A telephone apparatus, including a shutter for the transmitter, electromagnetic means for controlling saidshutter, a circuit controller means for said electromagnetic means, said-circuit controller being mounted on the telephone. receiver,"a circuit including. said circuitvc-ontroller andsaid ele ctromag netic means, and means in said circuit for automatically disconnecting said circuit whensaid electromagnetic means has functioned. V l

6. In a device of the character described, a' normally closed shutter, electromagnetic means for opening said shutter, electromagnetically operated means for retaining said shutter in closedposition, a remotely posi-p tioned circuit controller forjcontrolling said electromagnets, and means controlled by the position ofsaidishutterto effect the control .ofth'e circuitin response to said circuit controll'er, said means including a plurality of, circuit controllers; v i

7 Ina device of the character described, a normally closed shutter, electromagnetic means foropening saidshutter, electromagnetica'lly operated means for retaining said shutterin closed position, a remotely posi-' tioned circuit controller for controlling said electromagnets, and means controlled by the position of said shutter to effect the control of the circuit in response to said circuit controller, said means including a plurality of circuit controllers, one of said controllers being associated with the electromagnetic shutter-opening means.

8. In a device of the character described, a normally closed shutter, electromagnetic means for opening said shutter, electromagnetically operated means for retaining said shutter in closed position, a remotely positioned circuit controller for controlling said electromagnets, and means controlled by the position of said shutter to efiect the control of the circuit in response to said circuit controller, said means including a plurality of circuit controllers, one of said controllers being associated with the electromagnetic shutter-opening means, and one of said circuit controllers being associated with the electromagnetic releasing means.

9. The combination of a telephone apparatus having a transmitter and a receiver with a shutter associated with said transmitter, means for normally holding said shutter in one position, electromagnetic means for causing the shutter to take another position and preventing noises in the environment surrounding the telephone from being trans mitted through the telephone, and manual means for closing an electrical circuit to energize said electromagnetic means.

10. The combination of a telephone apparatus having a transmitter and a receiver with a shutter associated with said transmitter, means for normally holding said shutter in one position, electromagnetic means for closing said shutter on said transmitter and pie venting noises in the environment surrounding the telephone from being transmitted through the telephone, an electrical circuit connected to said electromagnetic means and a switch interposed in said circuit whereby the electromagnetic means can be energized and actuated to close the shutter when the telephone user desires to prevent noises from the environments surrounding the telephone from being transmitted therethrougli.

11. The combination of a telephone apparatus having a transmitter and a receiver with a shutter associated with said transmitter, means for normally holding said shutter in one position, electromagnetic means for closing said shutter on said transmitter and preventing noises in the environment surrounding the telephone from being transmitted through the telephone, an electrical circuit connected to said electromagnetic means and a switch mounted upon the receiver and interposed in said circuit, whereby the electromagnetic means can be energized and actuated to close the shutter when the telephone user desires to prevent noises from the environments surrounding the telephone from being transmitted therethrough.

12. The combination of a telephone apparatus having a transmitter and a receiver with a shutter associated with said transmitter, said shutter being normally in an opened position, electromagnetic means associated with said shutter for closing the latter and an electrical circuit connected to said electromagnetic means, a battery connected in said electrical circuit, a switch for closing said electrical circuit and energizing said electromagnetic means to cause the closing of the shutter, electro-magnetically operated means for holding said shutter in a closed condition and means associated with said shutter and controlled by the position of the latter to effect a control of the electrical circuit in response to the action of the aforesaid switch.

13. The combination of a telephone apparatus having a transmitter and a receiver with a normally open shutter for the transmitter, a stop for holding said shutter in an open position, an electromagnet for withdrawing said stop and permitting the closing of said shutter, an electrical circuit connected to said electromagnetic means including a two-way switch and a battery, resilient means for causing the shutter to close when the said electromagnet is energized by closing said switch and said stop is withdrawn, a circuit breaker operatively associated with said shutter in such a manner that when the shutter reaches its closed position the electrical energy flowing through said circuit from. the battery is discontinued, a second electromagnet associated with the shutter for moving the shutter into an open position against the action of the aforesaid resilient means, a circuit control means connected with a circuit leading to said second electromagnet and adapt ed to control said latter circuit in accordance with the position of the armature-of said rst electromagnet, said latter circuit being open when the armature of said first electromagnet is in an extended position and closed when the said armature is in a retracted position and the two-way switch is in a released condition.

FREDERICK THOMAS PEAK. 

